<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh+'px'}" class="scroll-left">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i===active?'active' : '']" @click="activeChanged(i)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
				<!-- 二级分类标题 -->
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<image :src="item3.cat_icon.replace('dev','web')"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 当前设备可用高度
				wh: 0,
				cateList: [],
				active: 0,
				cateLevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods: {
			//获取分类列表数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()

				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i) {
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop===0?1:0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid-'+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style>
	.scroll-view-container {
		display: flex;
	}

	.scroll-left {
		width: 120px;
	}

	.left-scroll-view-item {
		background-color: #F7F7F7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
	}

	.active {
		background-color: #FFFFFF;
		position: relative;

	}

	.active::before {
		content: ' ';
		display: block;
		width: 3px;
		background-color: #C00000;
		height: 30px;
		position: absolute;
		top: 50%;
		left: 0;
		transform: translateY(-50%);
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;
	}
	.cate-lv3-item {
		margin-bottom: 10px;
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
	}
	.cate-lv3-item image {
		width: 60px;
		height: 60px;
	}
	.cate-lv3-item text {
		font-size: 12px;
	}
</style>
